Income Taxes - NOL Carryforwards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Capital Loss Carryforward [Member]
Operating Loss Carryforwards [Line Items]
Other tax carryforward, amount	$ 3,700
Other tax carryforward, expiration date	Dec. 31, 2017
Capital Loss Carryforward [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Other tax carryforward, expiration date	Dec. 31, 2019
Charitable Contribution Carryovers [Member]
Operating Loss Carryforwards [Line Items]
Other tax carryforward, amount	$ 35
General Business Tax Credit Carryovers [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 1
General Business Tax Credit Carryovers [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Minimum Expiration Date	Dec. 31, 2030
AMT Tax Credit [Member]
Operating Loss Carryforwards [Line Items]
Tax Credit Carryforward, Amount	$ 426
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 57,700
Operating loss carryforwards, expiration dates	Dec. 31, 2028
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 136,800
Operating loss carryforwards, expiration dates	Dec. 31, 2026